Results 11 to 20 of about 503,274 (25)
Two mysterious universal dark matter-baryon relations in galaxies and galaxy clusters [PDF]
Phys. Dark Uni. 38, 101142 (2022), 2022 Starting from the 1970s, some relations connecting dark matter and baryons were discovered, such as the Tully-Fisher relation. However, many of the relations found in galaxies are quite different from that found in galaxy clusters. Here, we report two new mysterious universal relations connecting dark matter and baryons in both galaxies and galaxy ...
arxiv
Torques and angular momentum: Counter-rotation in galaxies and ring galaxies [PDF]
arXiv, 2016 We present an alternate origin scenario to explain the observed phenomena of (1) counter-rotation between different galaxy components and (2) the formation of ring galaxies. We suggest that these are direct consequences of the galaxy being acted upon by a torque which causes a change in its primordial spin angular momentum first observed as changes in ...
arxiv
Merger history of central galaxies in Semi-Analytic Models of galaxy formation [PDF]
, 2018 We investigate the dynamical evolution of galaxies in groups with different formation epochs. Galaxy groups have been selected to be in different dynamical states, namely dynamically old and dynamically young, which reflect their early and late formation times, respectively, based on their halo mass assembly.
arxiv +1 more source
Martin Schwarzschild's Contributions to Galaxy Dynamics [PDF]
arXiv, 1999 A retrospective of Martin Schwarzschild's work on galaxy dynamics.
arxiv
Galaxy And Mass Assembly (GAMA): 'No Smoking' zone for giant elliptical galaxies? [PDF]
, 2017 We study the radio emission of the most massive galaxies in a sample of dynamically relaxed and un-relaxed galaxy groups from Galaxy and Mass Assembly (GAMA). The dynamical state of the group is defined by the stellar dominance of the brightest group galaxy, e.g.
arxiv +1 more source
Elliptical Galaxy Dynamics: The Issues Pertaining to Galaxy Formation [PDF]
arXiv, 1999 How elliptical galaxy dynamics relate to galaxy structure, stellar populations, spiral galaxies and environment are reviewed. The evidence assembled shows that most, if not all, galaxies originally classified as gE contain disks within them. Taken together, the existing evidence are most consistent with the gravitational, hierarchical, clustering ...
arxiv
A catalog of automatically detected ring galaxy candidates in PanSTARRS [PDF]
arXiv, 2017 We developed and applied a computer analysis method to detect ring galaxy candidates in the first data release of PanSTARRS. The method works by applying a low-pass filter, followed by dynamic global thresholding to search for closed regions in the binary mask of each galaxy image.
arxiv
Dynamics of Galaxies in Clusters [PDF]
arXiv, 1998 Recent observations by the Hubble Space Telescope suggest that a strong dynamical and morphological evolution of disk galaxies has occurred in clusters of galaxies. I present the result of the self-consistent high-resolution simulations of galactc dynamics in the three cosmologically formed clusters. The disks of large galaxies survive but thicken by a
arxiv
arXiv, 1998 Interacting galaxies are a natural arena for studies of non-equilibrium stellar dynamics, gas dynamics, and thermodynamics. Only galaxy formation itself is as deeply concerned with as many different aspects of dynamics, and the connection between interactions and the formation of galaxies is probably no coincidence.
arxiv
Massive black holes in merging galaxies [PDF]
arXiv, 2015 The dynamics of massive black holes (BHs) in galaxy mergers is a rich field of research that has seen much progress in recent years. In this contribution we briefly review the processes describing the journey of BHs during mergers, from the cosmic context all the way to when BHs coalesce.
arxiv